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1999年  第16卷  第1期

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论文
超形变核态的相互作用玻色子模型研究
孙洪洲, 刘玉鑫
1999, 16(1): 1-5. doi: 10.11804/NuclPhysRev.16.01.001
摘要:
概要介绍了超形变核态的相互作用玻色子模型研究的现状、理论框架及一些应用.The present status, the framework and some applications of the investigation on the superdeformed nuclear states in the scheme of the interacting boson model are described.
原子核代数模型中的F-旋混合态、回弯、电磁跃迁问题的研究
龙桂鲁, 张伟林, 纪华鹰, 李岩松, 屠长存, 牛力, 赵恩广, 朱胜江
1999, 16(1): 6-10. doi: 10.11804/NuclPhysRev.16.01.006
摘要:
在原子核的代数模型框架下,讨论了集体回弯效应、较高自旋的F-旋混合对称态以及电磁跃迁几率等问题. The collective backbending effect, F spin mixed symmetry states have been studied for the nuclei with moderate high spins. It is found that there is an additional L(L+3) proportional term in the E2 transition rates in the sdg interacting boson model and solved the long standing problem of reduction of collectivity in the wave function of boson models. The electromagnetic transitions in the spdf interacting boson model have been calculated and compared with existing experimental...
O(N)>O(N-1)约化因子
阮东, 孙洪洲
1999, 16(1): 11-15. doi: 10.11804/NuclPhysRev.16.01.011
摘要:
利用不可约张量基的概念和不可约张量算符的性质,给出了所有O(N)O(N-1)约化因子(m1Nm2N…m[N/2]N)(10…0)的代数表达式. The algebraic expressions for all O(N)  O(N-1) reduction factors for (m 1N m 2N … m N )  (1 0 … 0) are given by using the concept of irreducible tensor basis and the properties of irreducible tensor operator.
现代应用物理系的原子核结构实验研究简介
朱胜江
1999, 16(1): 16-22. doi: 10.11804/NuclPhysRev.16.01.016
摘要:
对近年来清华大学现代应用物理系开展的原子核结构实验研究的情况作了介绍,着重对所研究过的核高自旋态(包括个别核的低自旋态)结构特性进行了简述.The experimental research on nuclear structure in Department of Modern Applied Physics, Tsinghua University has been summarized. The main research results in high spin states of nuclear structure, as well as some low spin states, have been reported.
围绕Z=56和N=88丰中子核区八极形变的研究
朱胜江
1999, 16(1): 23-30. doi: 10.11804/NuclPhysRev.16.01.023
摘要:
介绍了通过测量重核裂变产生的瞬发γ谱方法,对围绕Z=56、N=88丰中子核区高自旋态八极形变的研究,并对Xe、Ba、Ce和La等丰中子核链的八极形变特性进行了讨Through study of the prompt γ rays in spontaneous fission, the octupole deformation in neutron rich Xe, Ba, Ce and La isotopes around Z =56, N =88 region was assigned. The properties of the octupole deformation in these nuclei were also discussed. 论.
快中子(n,α)和(n,p)反应的研究
陈泽民, 张雪梅, 陈迎棠, 唐国有, 张国辉, Yd Gledenov, G khuukhenkhuu, M V Sedysheva
1999, 16(1): 31-36. doi: 10.11804/NuclPhysRev.16.01.031
摘要:
快中子核反应数据,不论对反应堆和聚变堆的设计,还是对核反应机制和核结构的研究及其理论的发展均有着重要的意义.由于屏栅电离室的诸多特点,被用于快中子核反应截面、能谱及双微分截面的测量.作为系统研究的一部分,利用屏栅电离室在北京大学4.5MV静电加速器上和在4~7MeV能区内,对40Ca、64Zn、58Ni、54Fe、39K的(n,α)反应进行了成功的测量,并对58Ni的(n,p)反应进行了初步的测量.实验给出了反应中出射粒子的微分能谱、角分布和反应截面.从测量结果来看,在所测能区内,角分布大致是90°对称的,说明在此能区复合核反应机制起主要作用.The study of the charged particle emission reactions induced by 3~7 MeV fast neutrons is of considerable interest for both nuclear applications and the understanding of basic nuclear problems. For its many merits, twin gridded ionization chamber is used in the studies of (n,α) and (n,p) reactions. As a part of systematic investigation, the (n,α) reactions for some nuclei, such as 40 Ca, 64 Zn, 58 Ni, 54 Fe, 39 K have been studied. Cross sections...
色散光学模型参数的评价与应用
陈振鹏, 彭钦增, 孙业英
1999, 16(1): 37-39. doi: 10.11804/NuclPhysRev.16.01.037
摘要:
仔细评价并介绍了几个可在核数据工作中直接应用的中重核色散光学模型参数.By careful analysis, the parameters of DOMA (Disperse Optical Model Analysis) for some medium and heavy nucleus are determined. These parameters are useful for the evaluation of nuclear data.
低能核反应理论的研究与应用
陈振鹏
1999, 16(1): 40-41. doi: 10.11804/NuclPhysRev.16.01.040
摘要:
介绍有关低能核反应理论的研究与应用工作.The work for research and application of low energy nuclear reaction theories is introduced.
208Pb平均振幅或形变参数系统研究及中子直接非弹性散射截面计算
陈振鹏, 祝清源, 孙业英
1999, 16(1): 42-43. doi: 10.11804/NuclPhysRev.16.01.042
摘要:
对208Pb的低激发态分立能级属性和相关平均振幅或形变参数进行了系统研究,利用扭曲波波恩近似方法系统计算了12个分立能级的中子直接非弹性散射截面. The amplitudes or form factors of the low discrete levels of 208 Pb are investigated systematically, the neutron direct inelastic scattering cross sections from 12 levels on 208 Pb are calculated.
等时量子输运理论
庄鹏飞
1999, 16(1): 44-46. doi: 10.11804/NuclPhysRev.16.01.044
摘要:
在普遍量子情形下,建立了协变Wigner函数的能量矩的等时动力论链和链的截断方案,得到了与低阶矩相关的物理密度量的输运方程和约束方程,并且证明高阶矩都能通过低阶矩表示.
极化电子源的原理及实验研究
尚仁成, 高君芳, 肖渊, 庞文宁, 邓景康
1999, 16(1): 47-53. doi: 10.11804/NuclPhysRev.16.01.047
摘要:
简单介绍了极化电子束的获得,即极化电子源,讨论了对电子束极化度的测量,极化电子与原子散射,以及极化电子束在固物理、生物物理、核物理与粒子物理中的应用. The getting of polarized electrons was briefly introduced, that is the source of polarized electrons. The measurement of polarization in future, the application of polarized electrons in atomic and molecular physics, condensed physics, biological physics, nuclear and particle physics were discussed.
极化电子在(e,2e)散射中的应用
肖渊, 庞文宁, 尚仁成, 阮存军, 高君芳, 张文新, 高乃飞
1999, 16(1): 54-57. doi: 10.11804/NuclPhysRev.16.01.054
摘要:
介绍了用极化电子进行(e,2e)散射的意义及其当前国际上的进展,然后对正在研制的一台(e,2e)谱仪进行了介绍,包括其总体结构及关键部分的特色,其中着重讨论了一种光学极化仪.
BEPC Compton散射极化仪的理论研究
宁传刚, 邓景康, 尚仁成, 卢杰
1999, 16(1): 58-60. doi: 10.11804/NuclPhysRev.16.01.058
摘要:
简要介绍了圆偏振激光在极化电子束上的Compton散射理论,研究了北京正负电子对撞机(BEPC)极化仪的测量原理,并根据BEPC极化仪的实验参数计算了散射的能谱、空间分布和强度.The theory of Compton scattering of polarized photons on polarized electrons, and the principle of Beijing Electron Positron Collider (BEPC) Compton polarimeter are shortly discussed. The energy spectrum, vertical distributions and the intensity of Compton scattering under particular conditions are also calculated.
新型闪烁晶体的性能与应用研究
邓景康, 徐四大, 宁传刚, 尚仁成, 齐卉荃, 陈迎棠, 陈泽民, 皮海峰
1999, 16(1): 61-65. doi: 10.11804/NuclPhysRev.16.01.061
摘要:
概述国际上一些新型闪烁晶体的研究状况,重点介绍对BaF2和PbWO4闪烁晶体性能及其应用进行研究所取得的一些结果.The status of the study on some new scintillators is summarized, and the results of our researches on the properties and applications of BaF 2 and PbWO 4 crystals are discribed.
伴随粒子成像技术及其研究进展
徐四大, 朱维彬
1999, 16(1): 66-68. doi: 10.11804/NuclPhysRev.16.01.066
摘要:
综述伴随粒子成像技术的基本原理、主要性能和研究进展.伴随α粒子方法可以实现位置灵敏,可以用于需要位置灵敏的检查中,如机场隐蔽爆炸物的检查和毒品的检查,有着重要的应用前景. The basic principles, important characteristics and recent progress of associated particle imaging were reviewed. Associated particle imaging is position sensitive. It can be used in position sensitive examinations, for instance, hidden explosive inspection in airfield custom examination, drug examination. It has an important perspective in application.